package cn.itcast.bookmanager.util;

import javax.swing.*;
import java.awt.*;

public class test {
    public static void main(String[] args) {
        JFrame jf = new JFrame();
        JPanel jp = new JPanel();
        jf.setBounds(100,100,1000,1000);
        jp.setBackground(new Color(123));
        jp.setLayout(null);
        jf.add(jp);
        jf.setVisible(true);
    }
}
